Improvement in drilling-apparatus



uited @States SAMUEL LAUOHLI, OF ST. LOUIS,` MISSOURI, ASSIGNOR 'IO HIM- SELF AND FREDERICK SHICKLE, OF SAME PLACE.

Letters Patent No. 90,670, dated June 1, 1869.

IMPROVEMENT IN DRILLING-APPARATUS.

The Schedule referred to in these Letters Patent and making part of the same.

To all lwhom 'it may concern Be it known t-hat I, SAMUEL LAUCHLI, of St. Louis, in the county' of St. Louis, and State of Missouri,

have made certain new and useful Improvements iu Drilling-Apparatus; and I do hereby declare that the following is afull and clear description thereof, refer- -ence being had to the accompanying drawings, and to -dle shall, in a forward motion, bind upon said rollers,

and thus also turn the drill-stock within Abut upon a return` motion, (in contrary direction to the forward motion aforesaid,) the wrench-collar shallA release thc rollers, and thus the handles alone shall perform said return motion.

The nature of said invention is, furthermore, in a combination of two handles, by which, iu using short, rapid strokes,'an operator is enabled to increase the operative speed of the drilling or cutting-tool, all of which will hereinafter more fully appear.

To enable those skilled herein to make and use my said invention, I will now more fully describe the same, referring to the accompanying Figure l as a plan; to

Figure 2 as a sectional elevation; to

Figure 3 as a plan, showing the rollers as seen after removing superincnmbent parts.

The said iguresrepresent my said improvements in their adaptation to ordinary hand-drill or cuttingtool.

A represents the tool-stock, into which a drillingtool, screw-thread cutter, or similar tool is inserted in the ordinary malfner.

At the upper end of the tool-stock, the feed-screw B is arranged, which engages in a proper nut in said drill-stock. Y

Said feed-screw has the eye b, for inserting a small rod or lever to turn said screw, asin the ordinary handfeed motion.

The end b of said screw B heilig brought toa-bear ing in a proper drill-frame, or against a proper rest, the operator, by turning the feed-screw B, (the drillstock being held against turning,) forces the tool down, producing the feed-motion. in the usual manner.

About the middle of the length of the drill-stock A, I arrange the liange a, having one or more mortises, a', as indicated in g. 3.

In each of said mortises is'- arranged a cylindrical roller, C. l

The said mortises c are soformed that said roller may be fully contained without projecting beyond the line ofthe outer cylindrical surface of the said flange a., but that when said rollers pass out of said position, they will at once impinge upon the exterior parts now to be described.

About said ilange a, I arrange the handle or handles D, having, at the junction with said flange a, the collar d.

Owing to the construction of the mortises a' aforesaid, the rollers C, in a forward movement vof the handle D, by their contact with the inner surface of the collal' d, will move outwardly to a lock, the inner edge of the mortise a being arr-ranged tangentially to the circle of the drill-stock A, for-the special purpose of moving the said rollers out to the lock.

Then, so long as the operator continues the forward motion of the said handle, the roller is jammed tightly between the tangential edge or surface of the drllstock mortise and the handle-collar d. f

Thus the drill-stock is locked to and compelled to move and turn with the handle, as required by the operation of drilling or cutting which is to be performe-d.

In the return motion, however, the pressure of the collar d is to return the roller C to the receding por-V In light work, it is important to economivze time by operating the drill-stockwith increased speed.

This I accomplish by arranging the handle in two parts, D D', each being, by entirely similar series of rollers,- brought to action upon the drill-stock.

The operator, grasping both handles, performs the forward movement with one handle, at the same time that hcperforms the return stroke with the other handle.

When the work requires more eli'ort, the handles D are moved into contact with each other, and a setscrew, e, is inserted, to hold them together.

I prefer to use three rollers C, as three rollers giv- Having thus fully described my invention, What l claim, is- The combination :tud arrangement of the handles D and D', each having :t collar, d, lbout the flanges a, with the rollers G :tud check-nuts E, upon the stock A, substantially its und for the purposes set forth.

SAMUEL LAUCHLL Witnesses:

GEO. P. HERTHEL, Jr., WM. W. HERTHEL. 

